CRITICALVulnerability
Global

18-Year-Old NGINX Rewrite Module Flaw Enables Unauthenticated RCE

·Source: The Hacker News

Updated:

Executive Summary

Cybersecurity researchers have disclosed multiple security vulnerabilities impacting NGINX Plus and NGINX Open, including a critical flaw that remained undetected for 18 years. The vulnerability, discovered by depthfirst, is a heap buffer overflow issue impacting ngx_http_rewrite_module (CVE-2026-42945, CVSS v4 score: 9.2) that could allow an attacker to achieve remote code execution or cause a

Analysis

Cybersecurity researchers have disclosed multiple security vulnerabilities impacting NGINX Plus and NGINX Open, including a critical flaw that remained undetected for 18 years. The vulnerability, discovered by depthfirst, is a heap buffer overflow issue impacting ngx_http_rewrite_module (CVE-2026-42945, CVSS v4 score: 9.2) that could allow an attacker to achieve remote code execution or cause a

Indicators of Compromise (1)

CVE (1)
CVE-2026-42945
NVDMITRE CVE
Source Attribution

Originally published by The Hacker News on May 14, 2026.

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